Communications: radio wave antennas – Antennas – With coupling network or impedance in the leadin
Patent
1976-01-09
1977-06-28
Lieberman, Eli
Communications: radio wave antennas
Antennas
With coupling network or impedance in the leadin
343 7A, 343100SA, H01Q 326
Patent
active
040329224
ABSTRACT:
An antenna system utilizing the multibeam advantages of the Butler matrix achieve beam steering with the additional capability of placing nulls in the direction of undesired radiation. The system comprises essentially a Butler matrix with an adaptive circuit interposed between each of the antenna elements and a corresponding one of the hybrid matrices of the Butler matrix. Switch means are also provided for separating the transmit and receive functions.
REFERENCES:
patent: 3736592 (1973-05-01), Coleman
patent: 3868695 (1975-02-01), Kadak
patent: 3940770 (1976-02-01), Fassett et al.
patent: 3967279 (1976-06-01), Zeger
Fendelman H.
Lieberman Eli
Rubens G. J.
Sciascia R. S.
The United States of America as represented by the Secretary of
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